Concrete-pipe-bend machine



Feb. '23 1926. 11,514,433

- w. J. M KENZIE- CONCRETE PIPE BEND MACHINE Filed June 2 192-4 3 Sheets-Sheet 1 a0 2 1 4 1 g w 4 /2 [5 Z7 INVENTOR," kiilz'avt firl li efizz'e,

ATTORNEY Feb. .23 {1926.-

. I 1,574,433 w. J." MMKENZIE concms'rn PIPE BEND MACHINE? f Filed June 2 1 4 s Shet's-Sheet 2 III!IIIIIIIIIIIIIIIIIIIIIVIIIIIIIIIIIIIIIIIIll!!! ATTORNEY.

Patented Feb. 23, 1925.

UNITE, STATES ATENT OFFICE WILLIAM J. MACKENZIE, on PORTLAND, onneon.

CONCRETE-PIPEfiEND MACHINE.

Applicationfiled June 2, 1924. Serial No. 717,221.

The object of the invention is to provide a machine of the above described character wherein concrete pipe-bends of quarto-circular configuration or less may be molded with accuracy and despatch.

It is also an object of the invention to provide a separable mold of novel construction, together with means to secure the mold. aligned posi-,

within the machine in rigid, tion at both its ends and subject to instant removal upon the completion of the pipebend.

A further object of the invention is the provision of a mold-core of improved construction rigidly mounted-in the machine; means to adjustably center the corerelative to the mold; and means to effect the withdrawal of the core from the mold after the pipe is molded.

A still further object of the invention istheprovision of improved stop devices for the core actuating mechanism.

Other objects and advantages and objects relating to operative parts and construction, and in the combinations thereof will hereinafter appear in the detailed description to follov Theinvention is illustrated by way of example in-the accompanying drawings, in

which: i i

Figure 1 is a view in side elevation of an embodiment of my invention. Fig.2 is a top plan view of the same, partly broken away. I 1

Fig. 3 is .a view in vertical cross section with the platform shown as raised in broken lines and parts of the mold and core broken away.

Fig. Ais a partial view similar to Fig. 3 showing certain operative parts of the ma chine in another position.

Fig. 5 is a detached plan view of the moldplate element pftlrie invention.

side-frames 2 and 2 to which aJnoId-plate Fig. dis a cross sectional view of the same. I

Fig. 7 is a top plan view of a mold-receiving disk. r V Fig. 81s a view in cross section of the same. Fig. 9 is a view in side elevation of a sectional mold.

Fig. 10 is a view of the same in end ele- V vation. V v x Fig; 11 1s a fragmentary rear View of the core-board element;

Fig 12 is a view in side elevation of the same showing a portion of the core attached 1 a thereto. I I v Referringto said views, the reference nameral 1 indicates a base upon which is built and secured a rigidjframe-work of rectangular configuration "consisting in upright connected at their upper ends by front and rear beams 3 and 4, respectively. Said side frames are each formedwith corresponding integral diagonal braces -5. I V i p A transversely disposed shaft 6 is mounted to oscillate'adjacent-the top of said side frames and an arbor 7 is journaled for. rotation therebelowin parallel relatioiLmA sleeve :8 is rotatably mounted onsaid shaft 6 uponwhich a sprocket wheel 9 is keyed.-

Asprocket wheel 10 is keyed to. said arbor in vertical alignment withsaid sprocket 9 while they are operatively chain 11. A hand-wheel 12 said sleeve 8 adjacentthe frame whereby the sprockets and chain are actuated.

connected by a I is keyed upon 13 indicates a hanger swingingly mount ed on said shaft 6 by upperv end byscrewslG. The lower end of said plate is rigidly secured invertical p0 sition by-screws 17 to'a transverse bar 18 supported on said side frames. 1 Said mold braces 5, the-hanger 12 turning to any angle illustrated is at right angles to the upper of ninety degrees; mold is to be supapertured bosses 14 V 15 is secured at its desired. Any other degree of angularity or angular relation between the ends of the salami-sea sst "the pipe-bend maybe provided for by suitab'ly mounting a supporting bar similar to bars 18 or 20 upon whichtosecure the plate 15.

Said plate 15 is formed with a circular ridge 21 on its inner face and an aperture 22 is concentrically positioned therein. A different plate is usedwith ea'ch 'di fferent diameter of pipe molded wherein the ridge 2-1 and the opening 22 are of suitable size with respect to the pipe to be formed.

A platform 23 of steel plate is hingedly mounted upon said shaft 6 through apertur'ed swingingbrackets 24L and 25. Said platform when lowered entirely covers the upper sideof' said frame-work and is formed with a symmetrically disposed circular opening 26"of' adian1eter to receive the upper ends of molds of the largest size for which the machine isadap ted.

To accommodate molds of lesser size; at their upper orbelhend's supplemental-- disks 2? are provided; Each said disk is circular Zn form and of slightly larger diameter than the platform opening 26 and hasa concentric circular raised po 1 0a 28 adaptedto lit within said opening from underneath with its upper surface, flush with" the upper surface of the platform Said disk is further formed with an eccentric circular opening 29 ofsi'i'tlic'ient diameter t'orece'ive the upper end or them-01d for which it is intended. Disks 27 are provided having r'espectively a suitably sized opening 29 for each size of pipenold used on the machine except the" largest size wl'iich are receivable in the platform opening 26, the diameter and radius of the pipe determining the size and eccentricity of the openings therein. taaid disks are secured to the" platform by means of bolts (not shown) extending .hrough holes 27 of said disks and through said platfor ini Pairsof dowel-pins 27 are provided projecting upwardly from the resoective disks upon opposite sides of said opening 29' and adapted to protrude within corresponding holes in the platform where- Ly correct positioning of the disk relative to the platform may be guaranteed to al ways bring the eccentric opening" 29 in true alignment relative to the core.

A pipe-bend mold 30 used with my ma nhine consists of two h'al-f s'ectioi'isdivided"- in the plane of their" curvature and are more. particularly described l'iereiha-ft'er, 'lherr small or spigot end s supported within -the circular ridge 21 of the plate I5 and their upper end issup'ported' in the openin of the platform in the case-tr: the'larg st s-ized uolds or in the openings 29-01 the spectii 'e. disks; as seen in lTig. S

'lsooth'ed p ni'o-ns and 32 are keyedon thevarbor- 7 in spaced l 'l'titibll and toothed with, respectively, are pivotally supported. on the shaft 6. Therearradiusmembers 35 of said segments rigidly support a corehoa-rd- 36 disposed transversely therebetween secured by-screws 37-.

A hollow core 38 of suitable exterior size and radius: to' correspond with the mold employed is rigidly mounted upon said cor-e board by means of screws 39 extending through an annular internal flange 40 at the butt end ofsaid core. lhe opposite end of"s'aidcore;isrounded, asat ll', to admit of the core being easily withdrawn from the newly formed piperi'djustment screws 42 positioned at the four cor'ners of a square inscribed within'the; circular perimeter of the core mounted thereon extend tl'irough the co e-be'ardi iifi 'a nd hear upon said flange lowhere'by: the coremay be adjusted into exact register with tl ie'interior of the mold and-1n lllll cllcflltil" relationwith its pivotal center. After suitable adjustments of said screws l2 and locking the same with locknut's lfi thereo n', the screws 39 aretightened to rigi'd ly maintain the corein its set position.

A sleeve 44 is keyed on shaft 6- from which an arm 45 extends 'upwardly'and rearward- [y at an angle of approximately forty-five degrees from the vertical position of the coretoarcr when the latter isin its lowered or vertical position. At tension spring 46- is connected to said arm through the intermediary of a turn-buckle 47 and is connected: atits lowerend to the base, as at 48,

approximately in a vertical line through the axis of said shaft. In such position said spring counterbalances the core 38 while in the mold. The arm 4'5 travels over the center of said shaft in the rocking movements of said shaft as the coreis'withdrawn and when the c 're has been fully" withdrawn, as shown Fig; 3', the" arm 45 will extend at substantially thesaineangle as before upon the opposite side of said shaft and thereby thespring l6 will counterbalance the core in its outermost position. 7

h uinera-l 50 indicates a U-shaped yoke rigidly connected to said hand wheel 12 and turning freely at its outer end upon. screwthreaded extension 6 of said shaft. Op- ROSIDg flELHgQS 51 are formed on the inner sides ofthe-yoke A screw-threaded nut 52 1s 'inounted' on said shaft extension in threaded engagement therewith within the yoke and is formed or provided with bifurcated lugs 53 extending in opposite directions and slid'abl y engaging said flanges 51,

respectively. Said nut is further forn'ied with stop lu on opposite sides thereof.

58 extending through the split portion of 55 into engagement with the lug 6O ofeither collar 56 or-57 according to'the direction in which the hand-wheel is turned thus bringing the mechanism to a stop at adjusted positions. The stops thus provided may be made with extreme accuracy, it is positive in its action and readjust-ments to other set positions are readily made. I

The mold 30, as stated, is composed of two half-sections and are detachably connected t their joints by any suitable devices,

such as illustrated at 61. Each haltsection is formed with pairs of legs 62 integrally connected to the body of the mold and connected together by webs 68. A strip 65 extends across'the ends of each pair of legs forming a bearing for the mold upon the floor as well as providing handles with which the mold may be manipulated, There are preferably two such pairs of legs on each half-section of the quarter-bend molds. In the case of the eighth-bend molds but one such pair of legs may be used on each halfsection and when positioned upon the floor the mold will rest upon the one pair of legs and the bell-flange 66 of the mold.

The operation of my improved machine may be briefly described as follows: With the core maintained in its withdrawn position shown in Fig. 3 a mold 30 is placed in operative position as shown in said view having its opposite ends supported in the circular flanges 21 and its upper or bell-end within the opening 26 of the platform or within the opening 29 of one of said d1sks of suitable size. The hand-wheel 12 is then actuated by the operator to advance the core within the mold in concentric relation. Plastic pipe material may then be poured or shoveled into the mold surrounding said core and tamped to form a dense mass.

hen said material nearly reaches the top of the mold a bell-core 67 is inserted in the top over the rounded end of said core 38 tocenter it in the mold. The upper portion of the mold is then filled with concrete material and the top edge smoothed or finished off whereupon the core may be removed by the reverse action of the handwheel 12, as described.

'The platform 23 maythen be swungupwardly and the mold with the contained molded pipe readily removed from the machine by means of the handles 65 connected to the legs '62 of the mold upon Which itmay be rested upon the floor of thefactory. By means of said handlesthe mold-parts may be easily separated and the green pipe, removed from the sections when desired.

" Having described my invention, what I claim is 1. In a pipe-bend machine,ashaft having i a screw-threaded end, an actuatingwheel revolubly mounted on said shaft, a yoke rigidly secured to said wheel, a nutengaged upon said threaded end of said shaft and slidablyassociated withsaid yoke to turn therewith, thereby being caused to move longitudinally upon the shaft, said nut bein provided with a stop-lug,and a collar a justably 'connectedto said shaft-end proViding a stop to engage said stop-lug of said nut.

2. In a pipe-bend machine, a shaft having a screw-threaded end, an actuating wheel revolubly mounted on said shaft, a yoke rigidly secured to said engaged'upon said threaded end of the shaft and slidably associated with said yoke to turn with the wheel and thereby caused to move longitudinally upon the shaft, said nut being provided with stop-lugs on its opposite sides, and a collar adjustably con nected to the shaft upon each side of said nut, each collar being provided with 'alug wheel, a nut I engageable by the respective stop-lugs to stop the machine at adjusted positions.

3. In a pipe-bend machine, a shaft mounted for oscillation in the machineand having a screw-threaded end, a core-supporting structure keyed to said shaft,operative mechavnism whereby said core-supporting structure may be oscillated, and co-operating means associated with said wheel and said shaft to cause the core-supporting structure to stop at predetermined positions,

4. In a pipe-bend machine, a shaft mounted for oscillation in the machine and having a screw-threaded end, a core-supporting struc-' ture keyed to said shaft, operative mechanism may be oscillated in opposite, rotary directions from said wheel, a yoke rigidly connected to said wheel, a nut 'slidably connected in said yoke and caused movements thereof to move longitudinally upon said shaft-end, and adjustable means whereby the travel of said collar upon said shaft may be interrupted to bring the core: supporting structure to a stopat predetermined positions.

by the rotary 5. Ina pipe-bend machine, a platform havlng a circular openmgthereinto receive one end of a pipe-mold, and a disk rigidly secured in said openinghaving an opening eccentric with said openingin the-platform to accommodate pipe-molds oflesser curvature. V t I a 6. Ina pipe-bend machine, frame, a

platform 'hifngedly mounted in said frame 

